Electric-motor wrench.



E. W. BURROUGHS.

ELECTRIC MOTOR WRENCH.

APPLICATION FILED MAR.9,1914.

Patented July 7, 1914.

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EUGENE WOODLAND BURROUGHS, OF NORFOLK, VIRGINIA.

ELECTRIC-MOTOR WRENCH.

Specification of Letters Patent.

Patented July 7, 1914.

Application filed March 9, 1914. Serial No. 823,451.

To all whom, it may concern.

Be it known that I, EUGENE WV. BUR- nouons, a citizen of the UnitedStates of America, and resident of Norfolk, county of Norfolk, and Stateof Virginia, have invented certain new and useful Improvements inElectrieMotor \Vrenches, of which the following is a specification.

This invention relates to certain new and useful improvements inwrenches and it has for its objects among others to provide a simple,efliciont and easily operated electrically actuated wrench. I applymodern upto-date practice in motor work now being uscd for drillingrails and for other purposes in the simplest form possible. I employ anelectric motor designed to actuate a wrench through a train of gearingof suliicient reducing ratio to give the proper speed to the wrench andthe requisite power for turning the nut with a comparatively light andeasily operated motor. The motor is placed upon a carriage of such formas to permit of ready adjustment of the wrench to the rails without anyneedless leveling up or other time-consuming operations.

Other objects and advantages of the invention will hereinafter appearand the novel features thereof will be particularly pointed out in theappended claims.

The invention is clearly illustrated in the accompanying drawings,which, with the numerals of reference marked thereon, form a part ofthis specification, and in which Figure 1 is a side elevation showingthe application of my improved wrench to a rail, the latter, as well asa portion of the wrench proper, being shown in section. Fig. 2 is a topplan. Fig. 3 is a vertical cross section on the line 3-3 of Fig. 1looking in the direction of the arrows.

Like numerals of reference indicate like parts throughout the differentviews.

Referring to the drawings, 1 1 represent supports which may or maynot betubular, each having one end bent to form a hook 2 designed to engagebeneath the tread 3 and bear against the web 4 of a railway rail 5, theother ends of the supports 11 being designed to rest upon the rail 6 tothe nut-s of the bolts of which it is desired to apply power to tightenup or loosen the nuts. Mounted upon the supports 11 is a carriagecomprising preferably the three transverse bars or supports 7, S and 9,the ends of which are provided with the collars 1O to embrace thesupports 1-1, see particu larly Fig. 3, thus permitting of movement ofthe motor to and from the rail (3.

11 is an electric motor supported by and suspended from said carriage.

l2 and 13 are bearings carried by said motor in which is rotatablymounted the shaft 14 carrying the removable socket wrench 15 which, asseen in Fig. 1, is made deep enough to allow for the travel of the nut16 which it is designed to screwup or unscrew from the bolt 17 whichholds the lishplatcs 18 .in place. On the shaft 14 is a gear 19 withwhich meshes a smaller gear 20 on the shaft 21 of the motor. These gearsare so proportionml as to be of suilieient reducing ratio to give therequired speed to the wrench, as well as the requisite power for turningthe nut.

92 is the feed cable connected with any suitable source of electricityfor actuating the motor.

The supporting yokes 7 and 9 are provided with openings for thereception of the guiding pins 23 carried by the motor near the front andrear to guide the motor in its vertical adjustments, which adjustmentsare accomplished by means of the setting wheel 24 engaging the threads25 so that the motor may be easily adjusted to the proper height tobring the socket wrench in alinement with the nut to be turned.

The carriage with its motor and accessories may be readily slipped olfof the supports 11 and reversed so as to be used on the inside of therail if the nuts are disposed upon the inside instead of upon theoutside of the rail, as will be evident. The mode of use is apparent.The supports l-1 are engaged with their hooks 2-2 over the one rail withthe other ends of the supports resting upon the other rail and thesocket wrench applied to the nut. As the current is turned on, rotarymotion is imparted to the shaft 14 and, consequently, to the socketwrench 15, through the medium of the gears 19 and 20 and the carriageand motor forced against the rail until the nut is screwed up or turnedoff, as may be desired. The motor and wrench may be adjusted verticallyin accordance with the position of the nut, by turning the setting wheel24 in the proper direction.

Modifications in detail may be resorted to without departing from thespirit of the invention or sacrificing any of its advan tages.

WVhat is claimed as new is 1. In a motor-driven wrench, supportsengageable with a rail, a carriage removably and adjustably mounted uponsaid supports in the direction of their length, an electric motorsuspended from the carriage, a

wrench and gearing actuated by the motor for turning the wrench.

2. In a motor-driven wrench, supports engageable with a rail, a carriageremom my and adjustably mounted upon said support in the direction oftheir length, an electric motor suspended from the carriage, a wrenchand gearing actuated by the motor for turning the wrench, and means forvertical adjustment of the motor.

3. In a motor-driven wrench, parallel supports having hooked ends toengage a rail, a carriage movably mounted upon said sup port in thedirection of their length, a motor suspended from said carriage, asocket wrench, its shaft, and reducing gearing between said shaft andthe shaft of the motor.

4. In a motor-driven Wrench, parallel supports having hooked ends toengage a rail, a carriage movably mounted upon said supports, a motorsuspended from said carriage, a socket wrench, its shaft, reducinggearing between said shaft and the shaft of the motor, and means forbodily adjusting said motor vertically.

5. In a motor-driven wrench, parallel supports having hooked ends toengage a rail, a carriage movably mounted upon said supports, a motorsuspended from said carriage, a socket wrench, its shaft, and reducinggearing between said shaft and the shaft of the motor, said carriagebeing reversibly mounted upon said' supports.

Signed by me at Norfolk, Virginia, this third day of March 19H.

1 EUGENE WOODLAND BURROUGHS.

i Witnesses:

DENNIS H. DOZJER, LOUIS D; \VAL'rnns.

Copies of this patent may be obtained. for five cents each, byaddressing the Commissioner of ratents, Washington, 11G.

